Domains with DNS TXT v=spf1 +a +mx +ip6:2a01:4f8:10b:be6::2 include:_spf.fastmail.gr -all

There are 310 domains that have DNS TXT set to v=spf1 +a +mx +ip6:2a01:4f8:10b:be6::2 include:_spf.fastmail.gr -all. The top 50 records ordered by domain rank are listed below.